Our cemented carbide drills are composed by microcrystalline rare refractory metal carbide and high-purity cobalt powder for auxiliary metal or other metal powder as the binder. As a result of special production methods, and use of international advanced low pressure sintering furnace, the alloy is not only to maintain the original valued properties of tungsten carbide, and its performance increased by 1/4 than ordinary drawing die. At the same time, due to cobalt or other metal for cement, it becomes also tough.